Locomotive-firebox



w.1. LE|GHT Y.- LOCOMOTIVE FIREBOX. APPLICATION FILED OCT-28, 1915}.

. Witnesses Patented F b 22,1921;

JZW

w. J. LEIGHTY.

LOCOMOTIVE FIREBOX.

; APPLICATION FILED 0CT.28. I915. R 1,369,117, Patented M522, 1921.1

Wit messes;

W. J. LEIGHTY.

LOCOMOTIVE FIREBOX.

APPLICATION FILED 007.28. 1915.

Patented Feb. 2 2, 1921.

5 SHEETS-SHEET f- Wifcmzsses \Twntt W. J. LEIGHTY.

LOCOMOTIVE FIREBOX- APPLICATION FILED OCT.28 1915- Q Patented Feb. 22,1921. 3: .6"

5 SHEETSSHEET 5- TOGfioooo 0000.00 -000000 0 000000- Wz'm'es s es l UNITE STATES @FFEQE." a 7 WILLIA J. LEIGIIrY, or SPRINGFIELDQMQISSOURI, Ass GNoR' crown-Hanna; HENRY w. JACOBS, or cmoaeo; ILLINOIS. g

7 LOCOMOTIVE-FIREBOX.

Specification of Letters Patent. Patented F b 22 1921 Application filed October 28, 1915. Serial No. 58,399,

water-chambers or drums arranged along the bottom orlower sides of the firebox, in addition to the usual water-space. or chamber above the cro-Wn'of the firebox; the

; water-spaces or chambers being "connected by water-conveyingmembers or tubes arranged in such a manner as to materially enhance the steaming capacity of the fire-;

rather with the Water-space above the crown-sheet, are vertically disposed so as to constitute tubular side walls for the firebox while certain of the tubes are so arranged as to constitute an arch at the forward end of the firebox;. the construction and arrangement of the water-tubes being such, however, as to permit a free new or circulation upward through the water-tubes between the lower water-spaces or mud-- drum and the water-space or chamber "above, the crown sheet; the water-tubes bemg'so arranged as to provide a firebox whichis very eflicient in fuel consumption.

' The 'advantageslof my invention, which are inherent in the construction disclosed, will be more fully comprehended from the following detailed description of the drawings wherein Figure 1 is a longitudinal sectional view of the preferred form offmy invention; they proved construction as illustrated in 'Fi I Fig. 6 is a detail perspective view or disposition of the Watentubes.

Fig. 2 is a vertical cross sectioin'taken on' the line AA of Fig. 1, looking in the direction of the arrows, and more clearly disfigure disclosing the peculiar arrangement closing the transverse arrangement or disposition of the water-tubes which compose a portion of the sidewalls ofthe firebox as well as a tubular arch.

Fig. 3 illustrates a modified form of my invention; the figure being a partial side elevation and partial longitudinal section,

disclosing the construction and arrangement of the outer structure as well as the disposition of the water-tubes arrangedto constitute the inner'side walls of the firebox.

Fig. 4 is a partial rear end elevation'and' partial vertical sectional view taken 'on" the line BBof Fig. 3,-looking in the direction of the arrows, and disclosing the arran ment of the water-tubes as well as the construction of the lower water-spaces'or mud-v drums. i g f Fig. 5 is alsectional plan view of inyim- 1- and 2; the view beingtaken just above the in Fig. 2, with the water-tubes removed and the throat-sheets,flue-sheet, door-sheet and back head shown in sectionp of the upper left-hand corner of'the construction shown in Fig. 5 tl'1(.Vl6W illi'istrating the construction in up-ended' position in order to give a clearer view'into the Water space and disclose the reinforcing lug. V

In the particularexemplification of fmy invention as disclosed in Figs." land 2; the

crown-sheet of the firebox'is preferably com-' posed of a number oftransversely arranged flangesv'ertically.disposed into the waterspaoe or'chainberof the firebox. The 'ad-' jacent sides or flanged portions of'th'e sec; tlons 5 of the'crown-sheet are preferably;

' lower water spaces or mud-drums, as'shown channelsections 5 having their sides or provided with intervening "stay-sheets} ,orj

means of thefrivets I 7 The stay-sheets or strips '6 secure the seccalking strips '6 and secured together by V 100,

wherein the upper ends of the stay-sheets 6 cured to the roof-sheet 8 are preferably secured between the angleirons or members 9 by the rivets 10; the angle-irons or members 9 being shown secured to the root-sheet 8 by the rivets 11. In this manner the transversely arranged sections of the crown-sheet are supported from the roof-sheet in a very secure and, at the same time, economical manner.

The transversely arranged crown-sections 5 extend only part way across the central part of the crown of the firebox, as shown in Fig. 2, and have theirends contact with the semicircular side sections 12 of the crown sheet, to which they are secured in any suitable manner, but preferably by means of a serrated welded seem, as indicated at 13 the seam or weld being made in any suitable manner as, for example, by the autogenous method. By employing the serrated seam as herein disclosed, the efficiency of the welded joint is made equal to the strength of the rolled material in the direction of the strains to which the sections are subjected.

The semicircular sections or portions 12 of the crown-sheet, which are preferably welded as described to the crown-sheet channel-sections, have their opposite sides sepreferably by means of the riveted Seams 1 The semicircular sections 12, 12 of the ,crown-sheet'receive the upper en'cs oli'the different series of water-tubes 15, 16 and 1'7, see Fig. 2; the tubes constituting the sen 17 and connected with the semici lar in tions 12 being lead from the side of t is firebox opposite to that on which the respective semicircular crown section of the firebox is located.

, The stay-sheets 6 are soiorined or cut away at theirsides as toprovide a large space or cavity between the stay-sheets and the semicircular sections 12 of crownsheet, in order to permit the entrances of a man-above the crown-sheet, for the purpose of making any necessary repairs of. the tube connections with the crown-sheet.

In the particular exemplification the longitudinal sections of the mud-drum are formed to constitute water-spaces or-cham bers along the lower sides of the firebox, and preferably consist of separate transversely bent or curved members or walls 18, 18, 19 and 20. The members or walls 18 are secured attheir forward ends in any suitable manner to the flue-sheet 21, while the rear:

. ward ends of members or walls 18 are prop-' erly secured to the door-sheet 22. The members or walls 18 constitute theinnersides of the longitudinal sectionsor" the mud-drum and are adapted to receive the lower ends of the different series oi? water-tubes 15, 16

I i and 17 the watentubes being secured to the V vmembers or walls 18 any suitable manner 7 as rolling, beading and pressing or welding. By arranging member or wall 18 of the 'sufiicient distance to give a oi the water-tubesTis provided the series of water-tubes 15 being thus arranged to prac tically constitute the side wall proper 01" the firebox. The construction and arrangement also enables the'tubes to be spaced apa the bridge in the mud dfurn as well as in crown-sheet.

' tudinal sections of themud-drum'.have their sides secured to the sides of the-inner wall 18 by means of suitable joints 23mm as i can more clearly bc'seen'in Fig, 2. The outer walls or members ofthe longitudinal sections of the mud-ring may be provided with suitable'hand-holes, asshown for example at 25, in Fig. 2, to enable access being had to the chambers :or longitudinal sections of the mud-drum. In View, however, of the pe culiar construction and arrangement of the longitudinal sections of the mud-drum, the hand-holes may be-omitted if desired,

The solid or transverse. section 26 of the mud drum, at the forward endot the firebox, is preferably provided with upwardly extending lugs 27 at the end thereofiso as'to reinforce the fiue-sheet2l which maybe cured thereto by means of rivets 28, see Fig. 2. The solid transverse section 29- atthe rearward end of the firebox is also shown o provided with upwardly presented projec-- Q hollow longitudinal sections of the mudri 11g arranged at'the lower sides of the firebox. The construction shown and describes. permits complete circulation over the topaiid bottom of the firebox, in the usual manner, as the rear end 01: the firebox is composed of the usual doorsheet and back-head. coin inoirto locomotive boiler practice;

The spacesbetween the tubes 15 are shown filled wlth firebriclr 33, see'F 2;-the.iirebriclrfin turn, is showncovered with the lagging 84: which I is preferably provided with a sectional covering of metallic sheets. 3'5,'which may be secured in'place in any suitable manner, as; for example, by the angle-irons orbars 35, bolted or otherwise secured together. The fireb'rick, and sectional plates or ou er covering en tends fronr a point intermediate of the semi circular sections 12 of'the crown-sheet and 7 the firebox.

the uppermost portion of the longitudinal hollow sections of the mud-drum, asshown in Fig. 2, and thus provides a gas tight wall for the sides of the firebox which will prevent the escape oi the gases of combustion except, of course, through the fire-tubes or fiues in the flue-sheet 21..

The water-tubes 16 are inclined upwardly and inwardly andat a :distance removed from the Water tubes 15, with the ends. of the watentubes 16 connected withthe semi cire cular sections 12 and the inner walls 18 of the mud-drum located on the same side of the firebox. The water-tubes 17, which are located'at, a distance forward of the doorsheet or rear endof the firebox, are, arranged to extend from the longitudinal section of the mud-drum on one side of the'firebox in a slightly curved manner transversely of-the firebox to the semi-circular section of the crown-sheet located on the opposite side oi The water-Uubesof the series 17 are so arranged or'spaced apart as to permit the crossing of the tubes substantially at the longitudinal center line of the firebox; and the bend or inclination ofeach succeeding tube of this series is at such point, relative tothe ends of the tube,that the tubes will provide a rearwardly'ascendm vseli-su portin arch as verv clearl 1 C! A i 1 7 shown in Fig. 1-. It will be seen that the tubes are inclined and bent so as to cross each other adjacent the lower part of the firebox in the front end there'ohwhile the bend or inclination of each succeeding tube is arranged in a slightly hi her plane, so that the bend or inclination o the last tubes of this series will be at point slightly removed from the crown-sheet, as shown in Fig. 1 The'arrangement of the water-tubes,

as disclosed and described, provides a very eificlent heating surface because the tubes extend into the path of however, impairing the circulation or of the gases of combustion within the box; the gases, as will beseen, being to pass about the tubes.

The tubes-17, which are arranged to stitute an arch may borovered with the ases without 5 r 7 7 flow confirebrick 36 and 37, as shown to the right in.

Fig. 2, so as'to form a brick arch within the firebox. The brick arch may be omitted if desired. By employing the brick arch, the gases ofcombustion will pass upward about the water-tubes l7 and into the space between the tubes 17 and the transversely arranged sections of the crown-sheehso that he tubes 16 and 17 will be completelysurrounded by the hot gases or" combustion, thereby providing a great amount of heat absorbing surface. these tubes also tends to break up the intense heat of the fire and prevent it from striking directly against the tubes 15 which constitute the side walls of the firebox.

free

The arrangement of mud-drums to the water-space above the crown-sheet, which will prevent the watertubes from becoming overheated; at the same time providing a maximum amount of heating surface directly exposed to thehot gases of combustion within the firebox; T

In the particular exemplification of the invention, the flue-sheet 21 is shown provided with the offset 38 at the :upper or crown-portion. thereof, and with the offset portion. 39 along the sides, see Fig.1, thus insuringthenecessary flexibility totake up expansion in all directions. The door-sheet 22 is shown'provided with a doubleofiset-QO adj acent the upper or crown-portion thereof and with the offset e1 along the sid es,thus also permitting this sheet to take up any expansion which may occur. H I I The connection between the door-sheet22- and theback-head 32 may 'be'made in any suitable manner at the door-opening thereof, being preferably formed byan autogenous' weld, as shown at 4-2 in Fig. 1; the sheets being also secured or connected together? throughout their parallelingfiat surfaces by means of the stay-bolts 43. 4 Thefiuesheet 21 and the throat-sheet 31 are also connected together throughout their paralleling 'sur-, faces by means of the usual stay-bolts 44, see Fi 1. i

The back-head 32 of the firebox is shown provided with hand-holes, asat 45 in Fig. i

water-space above the -crow1'i-sheet; the

- hand-holes being preferably located in alin'ement with the enlarged space intermediate of the ends of the stay-sheets Band the semi-circular sections 12 of the .crownsheetv 1, for the purpose of giving access to the By reason. of the liand-holes (which are.

provided with suitable covers) inspection-of the firebox may be had. V Y I In order to further support the back-head the interior or water chamber portion of of the firebox at the upper-end thereof, '1

provide the stay-rods Mi -(see Fig. 1) which I extend lengthwise of the upper end of the firebox and are connected at their forward ends in any well known manner to the shell The crown-sheet and the mud-drums are provided with the usual washout'openings 48 and 49, respectively. V I have shown and described whatI believe to be the simplest and best forms of my inventlon, but the constructions may be altered in certain minor details without, however, departing from the spirit of my invention.

I I do not wish to be understood, therefore, as limitingmyself to the exact constructions shown and described.

What I claim is 1. In a locomotive firebox of the class described, provided with a crown sheet and mud-drums at the lower bottom longitudinal sides of the firebox, a plurality oi selt supporting water-tubes arranged in series intermediate of the crown sheet and the mud-drums, one series of tubes on each side of the firebox being arranged diagonally between the mud-drum at the bottom on one side of the firebox and a' portion of the crownsheet on theiopposite side of the fire- 7 box and at a distance removed from the front and rear ends of the firebox, with the oppositely disposed tubes of said series cross ing one another at substantially the longitudinal center line of the firebox, the point of crossing of the successive tubes being at an increasing distance removed from the bottom of the firebox from front to rear thereof so as to form a gasdeflecting arch intermediate of the front and rear end of the firebox.

2. A locomotive firebox of the class described, provided with a crown-sheet, muddrums at the bottom longitudinal sides of the firebox, and a plurality o1"? water-tubes extending from the mud-drums to the crownsheet, a portion of said water-tubes being arranged to constitute the inner ide walls of the firebox, while the other portion said water-tubes extend upwardly in a sloping manner from the mud-drum on one side of the firebox to a portionof the crown sheet on the opposite side oi the firebox, the water-tubes of said last mentioned portion being arranged to cross substantially at the longitudinal center line of the firebox, with the 'cros'sing of each succeeding water-tube, from front to rear, being in a higher horizontal plane and providing a self-supporting water-tube arch. Y

3. In a locomotive firebox, the combination of a crown-sheet and mud-drums arranged longitudinally along the lower sides of the firebox, with a plurality of upwardly disposed watertubes arranged ingroups intermediate oi the crown-sheet and the muddrum, one group of said tubes beingrarranged to constitute the inner side walls of the firebox, the tubes of a second group sloping upwardly in a diagonal manner from the mud-drum on one side of the firebox to a portion of the crown sheet on the opposite side of the firebox, the tubes of said group leading from opposite mud-drums being arranged to cross one another substantially at the longitudinal center. line of the arranged to constitute the inner side walls of the firebox intermediate of said water spaces and the crown-sheet, the tubes of the second group sloping upwardly in a diagonal manner from the lower waterspace at one side of the firebox to a portion of the crown-sheet onthe opposite side o1": the firebox, the tubes of said group leading from opposite sides being arranged to cross one another substantially at the longitudinal 7 center line of the firebox and at a higher horizontal plane from front to rear of the firebox and providing a self-supporting gasdefiecting water-tube arch, while a third' group of said water-tubes are'arranged intermediate of'the first'and second groups.

' WILLIAl l J; LEIGHTY.

lVitnesses:

DAVID M. LIGHT, EMERY G. GREEN. 

